CN205830116U - A kind of high-power LED light adjusting constant-current source - Google Patents
A kind of high-power LED light adjusting constant-current source Download PDFInfo
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- CN205830116U CN205830116U CN201620792907.0U CN201620792907U CN205830116U CN 205830116 U CN205830116 U CN 205830116U CN 201620792907 U CN201620792907 U CN 201620792907U CN 205830116 U CN205830116 U CN 205830116U
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Abstract
This utility model provides a kind of high-power LED light adjusting constant-current source, when solving the light modulation of existing LED, even if noise occur and flowing through the brightness problem the most devious of identical electric current LED.Scheme is, described button inputting circuits is connected with central processing unit, central processing unit is connected with regulating circuit, regulating circuit is connected with V/I change-over circuit, V/I change-over circuit is connected with LED, and power circuit is that button inputting circuits, central processing unit, regulating circuit, V/I change-over circuit and LED are powered.This utility model is controlled information by key-press input, and after chip U2 processes, adjustable constant-flow signal needed for V/I change-over circuit ensures LED again, electric current is constant current, it is the most adjustable, control high-powered LED lamp light modulation, when effectively solving the light modulation of existing LED, even if noise occurring and flowing through the brightness problem the most devious of identical electric current LED.
Description
Technical field
This utility model belongs to LED light regulating technology field, relates to a kind of high-power LED light adjusting constant-current source.
Background technology
LED is the green illumination light source of a new generation, has the plurality of advantages such as energy-conservation, environmental protection, high brightness, long-life, it
Being not only the new lover of lighting source, also closely bound up with the life of people, it is low that high-power LED illumination has running voltage, light efficiency
Height, the constant-current source power being generally used for LED both at home and abroad is less, and existing people propose new requirement, according to difference to the brightness of LED
Scene, the brightness needing LED is different, and during the light modulation of existing LED, even if producing big noise and flowing through identical
The brightness of electric current LED also has deviation, needs a kind of LED light modulation constant-current source to avoid the problems referred to above.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the purpose of this utility model is just to provide a kind of high-power
LED dims constant-current source, when effectively solving the light modulation of existing LED, even if noise occur and flowing through identical electric current LED
Brightness problem the most devious.
Its solution is, changes electricity including power circuit, button inputting circuits, central processing unit, regulating circuit, V/I
Road and LED, described button inputting circuits is connected with central processing unit, and central processing unit is connected with regulating circuit, regulating circuit
Being connected with V/I change-over circuit, V/I change-over circuit is connected with LED, and power circuit is button inputting circuits, central processing unit, tune
Volt circuit, V/I change-over circuit and LED are powered；
Described power circuit includes that transformator TR1, resistance R4, electric capacity C4, rectifier bridge BR1, electric capacity C5, three-terminal voltage-stabilizing are integrated
Circuit U 5 and circuit of three-terminal voltage-stabilizing integrated U2, the primary coil of described transformator TR1 connects civil power 220V, the secondary of transformator TR1
One end of coil is connected with one end of resistance R4, and one end of the secondary coil of transformator TR1 is connected with one end of electric capacity C4, resistance
The other end of R4 and the other end of electric capacity C4 are all connected with an ac input end of rectifier bridge BR1, another exchange of rectifier bridge BR1
The other end of the secondary coil of input termination transformator TR1, a DC output end of rectifier bridge BR1 connects with one end of electric capacity C5
Connecing, the other end of electric capacity C5 is connected with another DC output end of rectifier bridge BR1, one end of electric capacity C5 and the integrated electricity of three-terminal voltage-stabilizing
1 pin of road U5 connects, and 1 pin of circuit of three-terminal voltage-stabilizing integrated U5 is connected with one end of electric capacity C6, circuit of three-terminal voltage-stabilizing integrated
1 pin of U5 is connected with one end of electrochemical capacitor C7, and 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are connected with one end of electric capacity C10,
3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are connected with one end of electrochemical capacitor C11, and 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are
Leading-out terminal+12V power supply, 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are connected with 1 pin of circuit of three-terminal voltage-stabilizing integrated U2, three ends
3 pins of integrated regulator U2 are connected with one end of electrochemical capacitor C8,3 pins of circuit of three-terminal voltage-stabilizing integrated U2 and electric capacity C9
One end connect, 3 pins of circuit of three-terminal voltage-stabilizing integrated U2 are leading-out terminal+5V power supply, the other end of electric capacity C6, electrochemical capacitor C7
The other end, 2 pins of circuit of three-terminal voltage-stabilizing integrated U5, the other end of electric capacity C10, the other end of electrochemical capacitor C11, three ends steady
Press integrated short circuit 2 pins of U2, the other end all other ends with electric capacity C5 of the other end of electrochemical capacitor C8 and electric capacity C9 are connected；
Described button inputting circuits, central processing unit, regulating circuit, V/I change-over circuit and LED, including button K1, by
Key K2, button K3, button K4, model are the single-chip microcomputer U1 of AT89C51, model is the chip U2 of X9312, comparator U3, computing
Amplifier U4, field effect transistor Q1, audion Q2, LED D1 and LED D2, a termination+5V power supply of described button K1, button
The other end of K1 is connected with 1 pin of the single-chip microcomputer U1 that model is AT89C51, a termination+5V power supply of button K2, button K2's
The other end is connected with 2 pins of the single-chip microcomputer U1 that model is AT89C51, a termination+5V power supply of button K3, another of button K3
End is connected with 3 pins of the single-chip microcomputer U1 that model is AT89C51, button K4 one terminate+5V power supply, the other end of button K4 and
Model is that 4 pins of the single-chip microcomputer U1 of AT89C51 connect, and model is 26 pins of the single-chip microcomputer U1 of AT89C51,27 pins and 28
Pin is connected with 1 pin of chip U2,2 pins and 7 pins that model is X9312 respectively, and model is the 3 of the chip U2 of X9312
Pin and 4 pins ground connection GND, model is 6 pins of the chip U2 of X9312 and 8 pins all connect+5V power supply, and model is X9312
5 pins of chip U2 be connected with the in-phase input end of comparator U3, the reverse input end of comparator U3 is defeated with comparator U3's
Going out end to connect, the outfan of comparator U3 is connected with the in-phase input end of operational amplifier U4, and operational amplifier U4's is the most defeated
Entering end to be connected with one end of resistance R2, the outfan of operational amplifier U4 is connected with the grid of field effect transistor Q1, field effect transistor Q1
Source electrode be connected with the other end of resistance R2, the drain electrode of field effect transistor Q1 is connected with the colelctor electrode of audion Q2, audion Q2's
Base stage is connected with the source electrode of field effect transistor Q1, and the emitter stage of audion Q2 is connected with one end of resistance R3, the other end of resistance R3
Ground connection GND, one end of resistance R3 is connected with one end of resistance R2, and the colelctor electrode of audion Q2 connects with the negative pole of light emitting diode D1
Connecing, the positive pole of light emitting diode D1 is connected with the negative pole of light emitting diode D2, and the positive pole of light emitting diode D2 connects+12V power supply.
This utility model is controlled information by key-press input, and after chip U2 processes, then ensure LED through V/I change-over circuit
Adjustable constant-flow signal needed for lamp, electric current is constant current, is the most adjustable, controls high-powered LED lamp light modulation, effectively solves
During the light modulation of existing LED, even if noise occurring and flowing through the brightness problem the most devious of identical electric current LED.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of power circuit of the present utility model.
Fig. 2 is button inputting circuits of the present utility model, central processing unit, regulating circuit, V/I change-over circuit and LED
The circuit connection diagram connected.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Being given by Fig. 1 and Fig. 2, this utility model one high-power LED light adjusting constant-current source, described model is AT89C51's
19 pins of single-chip microcomputer U1 are connected with one end of electric capacity C1, and model is 19 pins and the crystal oscillator X1 of the single-chip microcomputer U1 of AT89C51
One end connects, and model is that 18 pins of the single-chip microcomputer U1 of AT89C51 are connected with one end of electric capacity C2, and model is the list of AT89C51
18 pins of sheet machine U1 are connected with the other end of crystal oscillator X1, the other end of electric capacity C1 and the other end of electric capacity C2 all ground connection GND, type
Number being that 9 pins of single-chip microcomputer U1 of AT89C51 are connected with one end of electric capacity C3, model is 9 pins of the single-chip microcomputer U1 of AT89C51
Being connected with one end of button K, the other end of electric capacity C3 and the other end of button K all connect+5V power supply, and model is the list of AT89C51
9 pins of sheet machine U1 are connected with one end of resistance R1, the other end ground connection GND of resistance R1.
Described model be the chip U2 of X9312 be Nonvolatile digital potentiometer.
Described circuit of three-terminal voltage-stabilizing integrated U2 be model be the circuit of three-terminal voltage-stabilizing integrated IC chip component of LM7812.
Described circuit of three-terminal voltage-stabilizing integrated U3 be model be the circuit of three-terminal voltage-stabilizing integrated IC chip component of LM7805.
This utility model in use,
Model be 1 pin of the single-chip microcomputer U1 of AT89C51,2 pins, 3 pins and 4 pins connect respectively button K1, by
Key K2, button K3 and button K4 are the inputs of control information, and model is 26 pins of the single-chip microcomputer U1 of AT89C51,27 pins and 28
Pin respectively be connected with 1 pin of chip U2,2 pins and 7 pins that model is X9312 composition regulating circuit, by button K1,
Button K2, button K3 and button K4 input control information, and control information analyzes and processes through the single-chip microcomputer U1 that model is AT89C51
After, carry out pressure regulation, then the V/I change-over circuit formed via comparator U3 and operational amplifier U4 through regulating circuit the most again, then may be used
Obtaining the adjustable constant-flow signal needed for LED, electric current is constant current, the most adjustable during electric current, therefore the adjustable high accuracy of constant current
Meet the light modulation needs of high-powered LED lamp, it is to avoid when regulating the brightness of LED, the noise of appearance on the impact of LED and
Make to flow through the problem of the brightness phenomenon devious of identical electric current LED, if button K1, button K2, button K3 and button
K4 is without controlling information input, then regulating circuit keeps original state constant, i.e. the brightness of LED is constant.
This utility model is controlled information by key-press input, and after chip U2 processes, then ensure LED through V/I change-over circuit
Adjustable constant-flow signal needed for lamp, electric current is constant current, is the most adjustable, controls high-powered LED lamp light modulation, effectively solves
During the light modulation of existing LED, even if noise occurring and flowing through the brightness problem the most devious of identical electric current LED.
Claims (4)
1. a high-power LED light adjusting constant-current source, including power circuit, button inputting circuits, central processing unit, regulating circuit,
V/I change-over circuit and LED, described button inputting circuits is connected with central processing unit, and central processing unit is connected with regulating circuit,
Regulating circuit is connected with V/I change-over circuit, and V/I change-over circuit is connected with LED, and power circuit is button inputting circuits, central authorities
Processor, regulating circuit, V/I change-over circuit and LED are powered；It is characterized in that,
Described power circuit includes transformator TR1, resistance R4, electric capacity C4, rectifier bridge BR1, electric capacity C5, circuit of three-terminal voltage-stabilizing integrated
U5 and circuit of three-terminal voltage-stabilizing integrated U2, the primary coil of described transformator TR1 connects civil power 220V, the secondary coil of transformator TR1
One end be connected with one end of resistance R4, one end of the secondary coil of transformator TR1 is connected with one end of electric capacity C4, resistance R4's
The other end of the other end and electric capacity C4 is all connected with an ac input end of rectifier bridge BR1, another exchange input of rectifier bridge BR1
The other end of the secondary coil of termination transformator TR1, a DC output end of rectifier bridge BR1 is connected with one end of electric capacity C5, electricity
The other end holding C5 is connected with another DC output end of rectifier bridge BR1, one end of electric capacity C5 and circuit of three-terminal voltage-stabilizing integrated U5
1 pin connect, 1 pin of circuit of three-terminal voltage-stabilizing integrated U5 is connected with one end of electric capacity C6, the 1 of circuit of three-terminal voltage-stabilizing integrated U5
Pin is connected with one end of electrochemical capacitor C7, and 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are connected with one end of electric capacity C10, three ends
3 pins of integrated regulator U5 are connected with one end of electrochemical capacitor C11, and 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are outlet
End+12V power supply, 3 pins of circuit of three-terminal voltage-stabilizing integrated U5 are connected with 1 pin of circuit of three-terminal voltage-stabilizing integrated U2, three-terminal voltage-stabilizing
3 pins of integrated circuit U2 are connected with one end of electrochemical capacitor C8,3 pins of circuit of three-terminal voltage-stabilizing integrated U2 and the one of electric capacity C9
End connect, 3 pins of circuit of three-terminal voltage-stabilizing integrated U2 are leading-out terminal+5V power supply, the other end of electric capacity C6, electrochemical capacitor C7 another
One end, 2 pins of circuit of three-terminal voltage-stabilizing integrated U5, the other end of electric capacity C10, the other end of electrochemical capacitor C11, three-terminal voltage-stabilizing collection
Become short circuit 2 pins of U2, the other end all other ends with electric capacity C5 of the other end of electrochemical capacitor C8 and electric capacity C9 are connected；
Described button inputting circuits, central processing unit, regulating circuit, V/I change-over circuit and LED, including button K1, button
K2, button K3, button K4, model are the single-chip microcomputer U1 of AT89C51, model is the chip U2 of X9312, comparator U3, computing are put
Big device U4, field effect transistor Q1, audion Q2, LED D1 and LED D2, a termination+5V power supply of described button K1, button K1
The other end be connected with 1 pin of the single-chip microcomputer U1 that model is AT89C51, button K2 one termination+5V power supply, button K2's is another
One end is connected with 2 pins of the single-chip microcomputer U1 that model is AT89C51, a termination+5V power supply of button K3, the other end of button K3
It is connected with 3 pins of the single-chip microcomputer U1 that model is AT89C51, a termination+5V power supply of button K4, the other end of button K4 and type
Number being that 4 pins of the single-chip microcomputer U1 of AT89C51 connect, model is that 26 pins of the single-chip microcomputer U1 of AT89C51,27 pins and 28 draw
Foot is connected with 1 pin of chip U2,2 pins and 7 pins that model is X9312 respectively, and model is that the 3 of the chip U2 of X9312 draws
Foot and 4 pins ground connection GND, model is 6 pins of the chip U2 of X9312 and 8 pins all connect+5V power supply, and model is X9312's
5 pins of chip U2 are connected with the in-phase input end of comparator U3, the reverse input end of comparator U3 and the output of comparator U3
End connects, and the outfan of comparator U3 is connected with the in-phase input end of operational amplifier U4, the reverse input of operational amplifier U4
End is connected with one end of resistance R2, and the outfan of operational amplifier U4 is connected with the grid of field effect transistor Q1, field effect transistor Q1
Source electrode is connected with the other end of resistance R2, and the drain electrode of field effect transistor Q1 is connected with the colelctor electrode of audion Q2, the base of audion Q2
Pole is connected with the source electrode of field effect transistor Q1, and the emitter stage of audion Q2 is connected with one end of resistance R3, another termination of resistance R3
Ground GND, one end of resistance R3 is connected with one end of resistance R2, and the colelctor electrode of audion Q2 connects with the negative pole of light emitting diode D1
Connecing, the positive pole of light emitting diode D1 is connected with the negative pole of light emitting diode D2, and the positive pole of light emitting diode D2 connects+12V power supply.
A kind of high-power LED light adjusting constant-current source the most according to claim 1, it is characterised in that described model is AT89C51
19 pins of single-chip microcomputer U1 be connected with one end of electric capacity C1, model is 19 pins and the crystal oscillator X1 of the single-chip microcomputer U1 of AT89C51
One end connect, model is that 18 pins of the single-chip microcomputer U1 of AT89C51 are connected with one end of electric capacity C2, and model is AT89C51's
18 pins of single-chip microcomputer U1 are connected with the other end of crystal oscillator X1, the other end of electric capacity C1 and the other end of electric capacity C2 all ground connection GND,
Model is that 9 pins of the single-chip microcomputer U1 of AT89C51 are connected with one end of electric capacity C3, and model is that the 9 of the single-chip microcomputer U1 of AT89C51 draws
Foot is connected with one end of button K, and the other end of electric capacity C3 and the other end of button K all connect+5V power supply, and model is AT89C51's
9 pins of single-chip microcomputer U1 are connected with one end of resistance R1, the other end ground connection GND of resistance R1.
A kind of high-power LED light adjusting constant-current source the most according to claim 1, it is characterised in that described three-terminal voltage-stabilizing is integrated
Circuit U 2 be model be the circuit of three-terminal voltage-stabilizing integrated IC chip component of LM7812.
A kind of high-power LED light adjusting constant-current source the most according to claim 1, it is characterised in that described three-terminal voltage-stabilizing is integrated
Circuit U 3 be model be the circuit of three-terminal voltage-stabilizing integrated IC chip component of LM7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620792907.0U CN205830116U (en) | 2016-07-27 | 2016-07-27 | A kind of high-power LED light adjusting constant-current source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620792907.0U CN205830116U (en) | 2016-07-27 | 2016-07-27 | A kind of high-power LED light adjusting constant-current source |
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| CN205830116U true CN205830116U (en) | 2016-12-21 |
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| CN201620792907.0U Active CN205830116U (en) | 2016-07-27 | 2016-07-27 | A kind of high-power LED light adjusting constant-current source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110351930A (en) * | 2019-07-24 | 2019-10-18 | 广东德洛斯照明工业有限公司 | A kind of brightness control system and method for lamps and lanterns |
-
2016
- 2016-07-27 CN CN201620792907.0U patent/CN205830116U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110351930A (en) * | 2019-07-24 | 2019-10-18 | 广东德洛斯照明工业有限公司 | A kind of brightness control system and method for lamps and lanterns |
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